lhs and rhs

ICSharpCode.Decompiler/CSharp/Resolver/CSharpResolver.cs

@@ -805,7 +805,7 @@ namespace ICSharpCode.Decompiler.CSharp.Resolver
 					}
 					if (op == BinaryOperatorType.Equality || op == BinaryOperatorType.InEquality)
 					{
-						if (lhsType.IsReferenceType == true && rhsType.IsReferenceType == true && rhsType.Kind != TypeKind.Null
+						if (lhsType.IsReferenceType == true && rhsType.IsReferenceType == true && lhsType.Kind != TypeKind.Null && rhsType.Kind != TypeKind.Null
 							&& (conversions.IdentityConversion(lhsType, rhsType)
 								|| conversions.ExplicitConversion(lhsType, rhsType).IsReferenceConversion
 								|| conversions.ExplicitConversion(rhsType, lhsType).IsReferenceConversion))